Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01e62475b8b506bfa8e570800b298540fe650cca47c2f62313ac0e21793967f4' 
  AND token = 'LW2KS1fV537HwLflxxHtQSnQp3PM4BjhOhF37F6YZh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}